Police barricades block entry to the guesthouse of a suspected murder. / Yonhap

By Kang Aa-young, Park Si-sooPolice are searching for a guesthouse manager suspected of killing a female guest on Jeju Island.The manager, 34, has not been seen since Saturday.Police believe he is a prime suspect in the death of a woman whose body was found near the guesthouse in Gujwa-eup on Sunday. The woman appeared to have been strangled, police say.The suspect is believed to be on the mainland. According to police, the victim's family filed a missing person's report Saturday. Investigators visited the guesthouse and questioned the manager the same day, but found nothing suspicious about him. But they named him as a prime suspect after learning that he flew to the mainland six hours after being questioned.The victim's family said she travelled to Jeju last Wednesday and checked into the guesthouse. Other guests confirmed that she attended a party there at night, but they did not know what happened afterwards.